Adjustable guard-rail chock.



PATENTED FEB. 12, 1907.

G. M. ERVIN.

ADJUSTABLE GUARD RAIL GHOGK.

APPLIOATI OH FILED APE.11,1906.

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ETERS ca., WASHINGTON, n, c.

No. 843,880. PATENTED FEB. 12, 1907. G. M. ERVIN.

ADJUSTABLE GUARD RAIL GHOUK.

APPLICATION FILED APR.11,1906.

2 SHEETS-SHEBT 2.

WITNESSES IN I/E N T01? 62412505114: 1 BY 0M 1 ATTORNEY.

UNITED STATES PATENT OFFICE EORGE M. ERVIN, OF JOHNSTOWN, PENNSYLVANIA,ASSIGNOR TO THE LORAIN STEEL COMPANY, A CORPORATION OF PENNSYLVANIA.

ADJUSTABLE (UARD l-M-llt. CHUCK Specification of Letters Patent.

Patented Feb. 12, 1907.

Application filed April 11, 1906. Serial No. 311,046.

To all 1072/0711, it may concern.-

Be it known that I, Gnonon M. Envm, 0f Johnstown, in the county ofCambria and State of Pennsylvania, have invented a new and usefulimprovement in Adjustable Guard-R ail Chocks, of which the following isa full, clear, and exact description, reference being had to theaccompanying drawings, which form a part of this specification.

This invention relates to certain new and useful improvements inadjustable checks for guard-rails; and it has for its object to providea simple, cheap, durable, and eflicient device of ti is character wliichcan be readily applied and is capable of adjustment while the severalmembers will be held in perfect alinement with relation to each other.

With these objects in view my invention consists in the novelconstruction, arrangement, and combination of parts, all substantiallyas hereinafter described, and pointed out in the a'opended claims,reference being had to the accompanying drawings, in wmcii Figure 1 is aplan view of a rail and guardrail with my improved chock securedthereto. Fig. 2 is a sectional view on the line 2 2 of Fig. 1. Fig. 3 isa perspective view of the several parts of my improved chock. Fig. at isa view similar to Fig. l of a modified form of chock. Fig. Sisasectional view on theline 5 5 of Fig. 4. Fig. Sis aperspective view ofthe several parts of the chock shown in Figs. 4 and 5.

A is the main rail, A the guard-rail, both of the well known T railcross section. Placed between these rails is the chock, whicl'i iscomposed of the members B, G, and D. The rails and the chock members arerigidly held together by means of the bolt E and nuts 0 e. The bolt Epasses through orifices in the rails A and A an d through thelongitudinal slots Z), c, and (Z of the respective chock members B, C,and D.

The members B, G, and D of the chock are tapered or wedge-shaped. The.inner faces of the members B and D have each two rows of teeth orcorrugations l) l) d d, respectively, converging toward each other, wilethe member C has two rows of tooth or corrugations e c on one face andthe teeth 0 c on the other face both sets of teeth on the same sideconverging toward each other, the teeth (Z on the member D engaging withthe teeth 0 of the member 0 and the teeth I) of the member B engagingthe teeth 0 of the member G.

As can be seen from the drawings, when the several members are boltedtogether neither of the members can be shifted either vertically orhorizontally, due to the two series of teeth being out of alinement witheach other. By releasing the bolt and advancing or retracting one orboth of the members B and D the guard-rail A can be moved toward or awayfrom t e main rail A.

In the modification shown in Figs. 4, 5, and 6 the check; is composed ofthe members G and H, the member G being tapered in form and having thelongitudinal slot 9, through which the bolt E passes. The inner face ofthe member G is ccncaved. Running from the apex of this concavity to thetop and bottom of the member G are the teeth 9 g. The member H is alsotapered in form, having the longitudinal bolt-slot it. The innor face ofthe member H is of convex form, provided with the teethh h on each faceof i the convex side, diverging from the apex to the top and bottom ofthe member H, the teeth h 7L interlocking with the teeth 9 g. As can bseen from the drawings, when these members G and H are bolted togetherthe members will be held in perfect vertical and horizontal alinement.

I do not wish to limit myself to the specific arrangement of teeth forretaining the chock members in alinement with each other. The line theteeth might be varied without departing from the spirit of theinvention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In an adjustable chock, two or more tapered members, the adjacentfaces of each member having interlocking teeth, the teeth on one line ofeach member being out of alinement with the teeth on another line of thesame member.

2. in an adjustable chock, two or more tapered members, the adjacentfaces of each member having interlocking diverging teeth for the purposeset forth.

3. In an adjustable chock, two or more tapered members, the adjacentfaces of the members having interlocking teeth, the teeth on one linebeing at an angle with the teeth on another line.

ICO

4. An adjustable rail-chock, having a plu having sets of teeth orprojections on both rality of wedge members, Whose adjacent sides atdifferent angles, and the lateral memfaces are provided with sets ofteeth at differbers having teeth or projections adapted to ent angles.interlock with those of the central member.

5 5. An adjustable rail-chock, composed of In testimony whereof I haveaffixed my I 5 three wedge members, the adjacent faces of signature inpresence of two witnesses.

said members having interlocking teeth at GEORGE M. ERVIN. difierentangles substantially as described. Witnesses: Y

6. An adjustable rail-chock, composed of L. OCONNELL,

10 three wedge members, the central member H. W, SMITH.

